Research on Implementation Path and Risk Control of Large Enterprise Campus Network Upgrade and Renovation Projects

Abstract

With the routine deployment of services such as ultra-high-definition video, real-time industrial signaling, and distributed storage, the backplane bandwidth, forwarding capability, and concurrent connection count of traditional campus networks are approaching their design limits, and multi-vendor protocol differences and irregular topologies further exacerbate upgrade complexity. This study focuses on the implementation path and risk control of upgrade and renovation projects, analyzes the driving factors from three aspects—performance degradation, compatibility constraints, and change vulnerability—and proposes a progressive decoupling deployment of control and forwarding planes, a hybrid migration sequence of virtualization and physical devices, and a service-unaware cutover scheduling model; at the risk control level, it defines atomic rollback boundaries, designs a real-time suppression mechanism for flapping convergence, and constructs a fault injection pre‑validation method, thereby forming a complete technical framework for upgrade and renovation.